Thrust bearing



go g, 1932. y R- A, BAUDRY 1,876,83

' THRUsT BEARING Filed May l1, 1928 2 Sheets-Sheet l lNyENTR @iff ,4

' ATTGRNEY R. A. BAUDRY THRUST BEARING Filed May 11, 1928 2 Sheets-Sheet 2 Patented Aug. 9, 1.932

REN A. BAUDRY, orV wrtKrNsBUnc, PENNSYLVANIA; Assrelvon ro l* uric@ g i' 'rHRUsr BEARING lApplication filed May 11,

My invention relates to vertical thrust bearings, and more particularly to the structural arrangement of parts. c

Heretofore, a great many of the parts uti-l lized in thrust bearings have been of cast-material which was disposed lin the bearing uneconomically as well as ineiiiciently when Vthe advantage of access for maintenance of parts is considered. For instance, as shown in the McCarty Patent No. 1,595,800, granted on August 10, 1926 to the lVestinghouse Electric & Manufacturing Company, the segmental leveling shoes are supported by jack" screws which are retained by airing of cast iron that is disposed for the purpose of bracing the ack-screws and preventing rotation thereof, -yet bulky enoughto carry the entire bearing load. This ring rests upon the lbottom of an oil-pot which is also of castiron having an upwardly extendingcylindrical wall which cannot be removed when it is desired to remove one of the leveling shoes and thereby constitutes a hindrance. Y My invention has been developed during aV period of time when the trend in the con-V struction of machinery has been to efficiently distribute'the material by the utilization of sheet-iron plates and other structural parts. In the development of my invention, I have 301 utilized sheet-iron material and modern arcwelding methods to provide a thrust-bearing structure wherebyT the cost resulting from labor and material is greatly reduced. I pro-` vide also a leveling-shoe structure `which has many novel features in itself which contribute to the efficiency and desirability `of the construction as a whole. y

Further, my invention has oil-baffling structures which are arranged to facilitate in the assembly or dis-assembly thereof, ask for example, an outer cylindrical wall carries the oilcooling Coils and may be raised from the leveling-shoe base plate in order to provide access to the shoe. Y

It is an object of my invention to provide a .simpler and cheaper construction of an oil thrust bearing. A p It is another object of-my invention to pro- Y vide an oil-thrust bearing in which the level- 50 ing shoes are more accessible, as well as a 192s. Y serieu No. 277,052.

bearing shoe that is free from extended portions that would,` in any way, hinder its removal; 7' lt is a furtherobject of my invention to provide a'structu're whereby a great many machining operations required heretofore are eliminated. v Other objects and features of my invention will be brought out andv better understood upon reading the Yfollowing description and upon referring to the accompanying drawings in which, c' e A Figure' 1 is an elevational view of an oil thrustbearing, showing in cross-section the.

structural arrangement of parts.

Fig. 2 is a sectional view,'in elevation, of the novell leveling shoe, taken on the line H-II of FigB. and showing one segmental leveling shoe in its lower position.

Fig. 3 is a top plan view of the leveling shoe shown in Fig. 2. y

In Fig. 1, my thrust bearing isV shown resting upon the bracket 1 of a vertical-type dy# namo-electric machine having a vertical shaft 2. `The upper end of the shaft 2 has a thrust collar 3 secured to the should-er 4 and supported by a novel leveling shoe l5 ofmy invention.A Y*The leveling shoe 5 comprises an annular base plate'6l which supports a plurality of'screwe-ja'cks? that are disposed at equal circumferential distances on the top of the plate. The head of each jack screw receives a Vcylinder 8 of hard tool steel on which is disposed another cylinder 9 of the same material. The latter cylinder 9l engages the bottom of disc 11 that further engages a re"- cess in the underside of the segmental bearing shoe 12. A sleeve 13 has one of its ends secured tothe inn'erperiphery of the annular base plate and projects upwardly therefrom.

In order to prevent vrotation of the leveling shoes, an upper annular plate 14, having holes 15 in which are slidably mounted the discs 11, is supported above the base plate 6 by plates or supports 16 and the rod-supports 17 The plates or supports 16 are designed and disposed to provide against the entire shearing stress due to the tendency for the'shoes to rotate, and., for this reason, they are disposed in the intervals between the jack-screws lized heretofore, andmore particularly in the above mentionedpatentthe levelingl shoe was provided with a downwardly pro]ecting tenon upon which considerable machining wasnecessary in order that the part couldbe slid into,y

a recess obtained in a casliiron ring heretofore utilizedv and-unnecessary j my invention. Withmy invention; I eliminate theY projecting tenon and, consequently, eliminate the cost of machining.; Y

The bearing.. shoes- 12 yare prevented from turningfontheir underlying, discs1-1 by downwardly projecting d'owel pins 18 whichico operate with slots..19l `(shown -ineFig.. .3) ,i in the outer periphery of the -upper plate 14. A

locking device v20, projecting,- downwardly fromthebottom'of the upperplate 14E. (plan Y vview of which is shown in Fig. 3) and co operating Withtheheadvof. the jacl-screwvf,

maintains the .levelingf` shoe- .in` its-finalV adLN justed position...

- Upon lower1ng. .the,jackfscrew. 7,L the disc 11 slips-out.. of. recessaengagementwith thebearing...shoe .12.. and may, if desiredf, ,be'suplported by a pluralityof.downwardly extendinghooks21 At' any.rate,.the-discf11, when lowered, leaves the bearing-shoeres-ting onthe top. oftherupper `plate.llfwhere it Iis free for removal. by sliding it over .the .said upper I plate.

The entire bearing.isrsurroundedby .ani exterior cylindrical wall .22s having.y a bottom bossed portion, which- 1is-tightly Y bolted idownv tothe base plate 6 .oflthe,levelingshoe.y This. wall. and thesleeve 13providea chamber .for-

oil in which vthe bearingfpartsfare immersed.

rhe outer wall. 22 n carriesa-fcoo1i-ng. 'coil v.-23-

that' is removable. therewith and hasfinlet pipeY 24 and an outletpipe `25, .botlrof lwhich pass through twospnced horizontal plates'26 and 27. The-upperrplate 26 yprovidesa seal for the voil chamber, while' the lowerfplate27 theouter-peripheryof whichissecured to the` wallsandthe innerperiphery-ofl which is spaced. from a .vertically extendingfcylindrical wall 28. carried-by theinneri periphery ofV the upper horizontal. extending` plate, providesv a.dead k'air chamberin Iwhichwthe oil may rise, the advantages.` of which: are that the contact of the oil ,with` the. air, .while in' its;V turbulent: state, is decreased.-l The up wardly extending walla28-carries aahorizontalplatelwhichY is preferably'made .in two sections. having' abutting-portions '32.

The-inner'periphery of theupper plate 26 supportsa :spaced yvertically-projecting'; bafto the shaft abovethe thrust collar.

bulence and consequent admixture of. air with the oil, as explained in the'above mentioned patent. I-Ioles 35 are provided in the baiile at a height oppositethe edges of bearing sur-1 face, to allow some-of the'oil'to pass upon being ncentrifugally thrown. Any oil thai creepsupwardly on the outer surface of the thrust collaris further restricted by an inwardly projecting ring having holes through which excessoil may pass. Y

`The circulating pat-hof the-'oilis indica-ted bythe arrows. The oil is thrown outward,` ly from the Yedge of the bearing surface vbe,- cause'ofcentrifugal force and passes through the holes in the-baille plate to the cooling coils c where it is cooled, thence downwardly infthe= outer=portion of the chamber and up past thebearing shoes to the inner endzof the bearey ing-surfaces. A

A hole 37 is-provided in: the thrust collar. toprovide atmospheric pressure-at the inneredge of they bearingl surface in order to-prevent anyrcreepage of oil upwardly over-the. end of the sleeve and downthe surface of thea shaft n ILIoweveigfany oil which does escape; is? collected in the chamber provided 'inf'thei bracket of: the Vmachine,y f and is drained through a pipev extending therefrom. c.

'Ihe thrust collar 3- is designed much'dif-Yy ferently than collars :used heretofore inlarge bearingswherein the axial thrust onthe=col`,l lar was maintained by a -large nut threaded' rI`his nut would seal itself to the shaft andl becomef difiicultV to remove.- Also thenut was 4of heavy constructionand added much to the expense of thethrust bearing. Consequently,A thev cost-of the bearing hasbeen reduced by using.i the type of thrust collar that is illustrat'ed, where the lthrust is carried.byV a'plu-s rality of bolts 38v secured to thev shoulderAA ofthe shaft. f l

In ydis-assembling for removal of a. leve1-.

ing-shoe, after the oil within theoil cham ber-.is drained through a pipe 39, introducedI in the bottom of the base plate, the upper-v horizontally extending plate 31 is removed,

and the outer cylindrical wall 22, carrying sie ion

whereby the removal of a leveling-shoe is greatly facilitated in that the outer cylindrical wall can be removed, allowing the shoe to be extracted much more easily than in other constructions.

Further, by my invention, I have provided a thrust bearing wherein the material has been properly distributed with the view of saving in cost, as well as a thrust bearing which iss'eparate from the machine. I vdesire that only such limitations shall be made as are specified in the appended claims. Y

I claim as my invention:

l. In a leveling shoe for a vertical thrust bearing, a ring-shaped base plate, a plurality of j ack-screws secured to said plate, discs supported by said screws, segmental Y bearing shoes supported on said discs, said discs beingin recess engagement with the bottomsof said bearing shoes, means for preventing rotation of said shoes, comprising an upper, annularshaped plate spaced above said base plate and having holes therein, said discs being slidably mounted in said holes, means for preventing rotation of each of said shoes relative to each of said discs comprising a dowel pin extending downwardly from the' bottom of said shoes into a slot disposed in the outer periphery of said upper plate, and each of said shoes having a threaded hole adapted to receive a screw eye for removal of said shoe.

2. A vertical-shaft thrust bearing characterized by an oil reservoir having a base member, a plurality of separate upstanding internally threaded thin-walled'bosses, means for separately securing each of said bosses to said base member, screws in said bosses, a disc tiltably supported on the top of each screw, a separate top portion which is perforated to support said discs with freedom to slide vertically, separate structural-metal pieces for supporting said top portion from said base member, said pieces being so shaped and disposed as to provide for easy oil circulation, and a segmental bearing shoe interlockingly seated on the top of each of said discs and of a size larger than said perforations, the construction being such that, when the screws are screwed down, the shoes rest on top of said perforated portion out of interlocking engagement with the discs and can be removed by sliding outwardly over the surface of said perforated portion. Y

3. In a fabricated leveling shoe for a vertical thrust bearing, a base ring having an upstanding sleeve secured tothe inner periphery thereof, an upper guide ring supported by said base ring and having a plurality of holes therein, the supports between said upper guide ring and said base ringincluding a of said guide ring, said pipes being braced by ing internally threaded pipes .separatelyl welded to said base ring and -spaced therev around in substantially axial alignment with the holes of said guide ring, a jack-screw in each of said upstanding internally threaded pipes', a plurality of discs slidably supported in said holes by said jack-screws, and a plurality of bearing shoes supported by said discs, the supports between said upper guide ring and said baise ring'being open work s0 as to provide for easy oil circulation under said upper guide ring and into the inner edges of said bearing shoes.V

In testimony whereof, I have hereunto subscribed my name this first day of May, 1928.

REN A. BAUDRY.

plurality of plates with central, oil-passage Y notches therein, a plurality of upstanding internally threaded pipes separately welded to said base ring and spaced therearound in substantially axial alignment with the holes 

